02.22.2007 was prescribed Levaquin (750 mg) for sinus infection and cough. Took one that evening and another the next morning. Soon after the 2nd pill (an hour or so), I started feeling 'brain fog' and tingling up right side of neck into face and right side of head. I've had other health issues over the past year, so I am very suspicious of 'new' symptons and decided to see if levaquin had known side effects like the brain fog and tingling. Many sites report others having the same issues. I've only taken the 2 pills and won't be taking any more. Hopefully I won't have long term side effects. Best of luck to everyone.